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| author | Ganesh Ajjanagadde <gajjanagadde@gmail.com> | 2015-12-09 18:50:28 -0500 |
|---|---|---|
| committer | Ganesh Ajjanagadde <gajjanagadde@gmail.com> | 2015-12-17 08:12:41 -0800 |
| commit | 07a8fbaa553205b496b68a62cb7bf7a968d0281b (patch) | |
| tree | b7fe0c3c8623dcb358c242c2066aded57ee352d0 /libavcodec/vorbis_data.c | |
| parent | 39f8c7961dcd530e88d13c600145097106647d2e (diff) | |
| download | ffmpeg-07a8fbaa553205b496b68a62cb7bf7a968d0281b.tar.gz | |
lavc/nellymoserenc: avoid wasteful pow
exp2 suffices here. Some trivial speedup is done in addition here by
reusing results.
This retains accuracy, and in particular results in identical values
with GNU libm + gcc/clang.
sample benchmark (Haswell, GNU/Linux):
proposed : 424160 decicycles in pow_table, 512 runs, 0 skips
exp2 only: 1262093 decicycles in pow_table, 512 runs, 0 skips
old : 2849085 decicycles in pow_table, 512 runs, 0 skips
Reviewed-by: Michael Niedermayer <michael@niedermayer.cc>
Signed-off-by: Ganesh Ajjanagadde <gajjanagadde@gmail.com>
Diffstat (limited to 'libavcodec/vorbis_data.c')
0 files changed, 0 insertions, 0 deletions